Jeon Sae Ra loves the crowded places, flowers, baking cakes, and the coffee shop scent. She hates to be alone because it makes her feel empty and ended up making her lonely and sad. One day she moved to her new apartment. She thought the neighborhood will be quiet but not until the guy next door often shouts randomly, revealing everything from his mind. Indirectly makes Sae Ra feel as if she's not alone. They never talked but they knew each other through the noises that they heard from each others room. Until an unexpected thing happen, they finally met.